Icon for a display screen



FIG. 1 is a top, right perspective view of an icon for a display screen,the broken line drawing of a display screen is for illustrative purposesonly and forms no part of the claimed design; and,

FIG. 2 is a front elevational view thereof, on an enlarged scale, theicon is shown separately for clarity of illustration.

The ornamental design for "icon for a display screen", as shown anddescribed.